There is another facet of Hutton’s writings that is marvelously intriguing and pointedly illustrates how the development of even the most fundamental concepts in science sometimes hinge on vagaries in timing and opportunity. At the time of his death, Hutton had nearly completed a book entitled Elements of Agriculture. Attempts were made in 1806 to publish it that were never realized, and the manuscript circulated between custodians in the Royal Scottish Geographical Society and the Edinburg Geological Society before being housed from 1949 in the Royal Society of Edinburg. In essence, the manuscript was “lost” until 1947. In this book, Hutton writes:
To see this beautiful system of animal life (which is also applicable to vegetables) we are to consider, that in the infinite variation of the breed that form best adapted to the exercise of those instinctive arts, by which the species is to live, will be the most certainly continued in the propogation of this animal, and will be always tending more and more to perfect itself by the natural variation which is continually taking place. Thus, for example where dogs are to live by the swiftness of their feet and the sharpness of their sight, the form best adapted to that end will be the most certain of remaining, while those forms that are least adapted to this manner of chase will be the first to perish; and the same will hold good with regard to all other forms and faculties of the species, by which the instinctive arts of procuring its means of substance may be pursued.
There, from the pen of a man who died 11 years before Charles Darwin was born, is the idea of Natural Selection. Had Hutton’s book seen the light of day when it was written, rather than a century and a half later, it is he who might now be the icon of evolutionary biology – and the nemesis of creationists and other literal interpreters of religious tracts. And Darwin might be an obscure geologist/biologist, known primarily for his papers on the geology of the Andes, and for his treatises on orchids and earthworms. This is perhaps the greatest “if only” in the history of biology and geology.
It is important to stress, however, that while Hutton used the selection mechanism to explain the origin of varieties in nature, he specifically rejected the idea of the evolution of one species from another as a “romantic fantasy”. Indeed, he was a deist and regarded the capacity of a given species to adapt to local conditions as an example of benevolent design in nature.
Interestingly, Hutton was never married, but lived with his sisters, three amiable women, who managed his domestic affairs. Though he cared little for money, he had accumulated considerable wealth when he died, owing to his moderation and unassuming manner of life, as well as from the great ability with which his long-time friend, Mr. David, conducted their joint concerns.